Gas burner



June 14, 1932. A R, BETH L 1,863,003

GAS BURNER Filed May I3, 1929 Ill INVENTORE ATTORNEY.

Patented June 14, 1932 UNITED STATES GFFICE ALBERT R. BETHEL, F HUNTINGTON PARK, CALIFORNIA GAS BURNER Application filed May 13, 1929. Serial No. 362,791.

This invention relates to gas burners, and body by screws or like fastenings 9. Formed particularly to burners of that type in which integrally with the detachable closure plate illuminating or like gas and air are mixed in 8 is a gas receiving chamber 10 communithe burner and on their flow to the burner catingat its side facing the plate 8 with a orifice to form a combustible fluid in which threaded opening 11 extending through said 55 the air and gas are commingled in determined plate, and provided at its base portion with proportions. a tapering or frustro-conical suction tube 12 Heating burners for certain kinds of ap constituting a gas outlet. Fitted in the paratus, as, for instance, for use in connecthreaded opening 11 is a gas inlet tube13 tion with glass feeders, as heretofore conprovided with a gas feed bore, channel or 60 structed, have been uncertain and unreliable orifice 14, said orifice extending between the in action and have failed to meet the demand inner end of said tube and, an internally for a standard type of burner adapted to threaded applicator cap or fitting 15 adapted efiiciently burn a mixture of air with gas of for connection with a gas supply pipe. The

15 the different kinds or grades found in diflertube 13 is adjustable in the opening 11 for a 65 ent communities and in which the air is suppurpose hereinafter described and is adapted plied at low pressure from a fan or the like. to be fastened in adjusted position by a The primary object ofmy invention is to clamping or check nut 16. Extending from provide a burner in which the air and gas a side of the mixing chamber 3 at right angles admission valves are constructed and deto that side closed by the closure plate 8 is a 7 signed for proper relative actions and opertapering outlet for the air and gas mixture, ate in any position, from closed to wide open, which outlet is internally threaded to reto supply the proper quantity of air and gas ceive one end of a burner tube 17 or a confor admixture at any degree of opening. ductor to which a burner is attached.

A further object of the invention is to pro Extending axially through the chambers vide a burner in which interchangeable gas 2, 8 and'lO and through the opening at is a inlet andvalve seat tubes or fittings may be rotary stem 18 journaled near-one end in a used to adapt the burner to suit difierent bearing 19 in the inner wall of the chamber kinds and pressures of gas which may be sup- 10 and provided adjacent to its opposite :end

30 plied, so that a standard type of burner is with screw threads 20 extending through and produced for efficient use in all communities. engaging a threaded opening 21 in the closure The accompanying drawing shows in cencap 7 whereby the stem is rotatably mounted tral longitudinal section a burner constructed for a feed motion in a direction toward and in accordance with my invention. from the gas feed tube 13. The end of the 35 Referring now more particularly to the stem provided with the threads 20 carries a drawing, 1 designates the burner casing suitable operating handle 22, and on that part which is formed to provide an air receiving of the stem projecting through the passage chamber 2 and agas and air mixing cham- 5 the valve 6 is mounted and the end of the her 3, said chambers being in communicastem projecting toward the gas tube 13 be- 40 tion through a restricted air feed port 4.. A yond the bearing 19 is formed to provide-a tapering passage 5 is provided betweenthe tapered valve member 28 which is adapted chambers 2 and 3, -within which passage to extend to a greater or less extent into the moves an air feed controlling valve 6 which channel 14 of the tube 13 and to close against governs the flow of air through the port 4;. the wall at the rear Wall of said channel as a The outer sides of the chambers 2 and 3, seat. The valves 6 and 23 are thus carried that is," those sides directly opposite the by the stem'18 for simultaneous or conjoint joined sides of the' chambers communicating movement .to control the, inlet of air to-the through the port 4, are normally open and chamber 3 through the passage 5 and opening are closed in practice by closure plates 7 and Land to control the inlet of gas from the do 8 which are detachably secured to the casing channel 14- into the chamber 10 and thence 0 through the outlet 12 into the chamber 3. The valve 6 is disk-shaped or of mushroom type and is of such diameter relative to the contracted end of the passage as to close against such contracted end of the passage in close proximity to the opening 1 at the m0- ment the valve 23 closes against its seat at the inner end of the channel 1 1. The taper of the passage 5 and that of the valve 23 is such that, while, in the opening movement of the valves, the volumetric admission of gas and air will increase proportionately to the degree of opening movement of the valves, the ratio of proportionof air and gas to be employed to form the fuel mixture will at all times be maintained irrespective of the degree of opening movement of the valves. This ratio is fixed by initially turning the stem 18 to seat the valve 6 before the gas inlet tube 13 is applied or properly set in the opening 11, and then adjusting said tube 13 in the opening 11 until its channel 14: is closed by the tapering valve 23, when the burner will be setto supply a definite proportion of gas and air for admixture without regard to the volume admitted, which is controlled by opening the valves to a greater or less extent.

tube 13 of a predetermined or gaged size may be employed to provide for the feed of a given proportion of gas with respect to a given proportion of air in order to suit conditions required with respect to the character or quality of gas used in any certain community, and, by the use of interchangeable tubes 13, having channels let varying in diameter, the setting of the tube may be varied with respect to the valve 23 to change the proportion of gas with respect to that of the air to suit the quality or character of gas supplied in other communities. Thus it will be understood that the device may be regulated to supply air and gas in any given volume, within a predetermined period of time, while keeping the air and gas proportions fixed or constant, so that, with due regard to the character or quality of gas supplied, a mixture of the exact degree of richness to secure perfect combustion may at all times be supplied to the burner. A standard type of burner may thus be made which may be employed with equal efficiency in all communities notwithstanding variations in character and quality of gas, as well as the density of the air, by the use of a number of interchangeable gas inlet tubes 13 and a preliminary adjustment of the valves to set the valves with relation to their seats so as to govern the proportion of air and gas admitted on an opening movement of the valves to any degree. The chamber 2 is provided with an inlet 24 internally threaded for connection with a suitable type of air supply conductor leading from a source of supply of air under low pressure, such, for example, as an air supply fan driven in any preferred manplying air and gas in a constant proportion,

but varying in volume as needed, to the mixing chamber, from which the mixed fuel passes to the burner 17 for use, the mixing action and feed being promoted when the burner is in operation by an instituted suction action, as will be readily understood. According tothe temperature required the volume of fuel supplied to the burner for combustion may be increased to any extent desired by opening the valves, without changing the gas and air proportions of the mixture, so that a mixture of always the same degree of richness will be supplied. This allows the heating action to be governed or controlled with great accuracy in cases where a certain exact degree of temperature should be maintained, as, for example, in the heating of glass for the supply of liquefied glass to a feeder for delivery to molds, etc.

Having thus fully described my invention, I claim:

1. A gas burner comprising a burner casing having an air inlet chamber open at its outer side, a mixing chamber open at its outer side, a burner communicating with the mixing chamber, a tapering air feed passage connecting the air inlet chamber at its inner side with the inner side of the mixing chamber, closures for the outer sides of the chambers, said closures having threaded openings, a gas inlet chamber carried by the closure of the mixing chamber and communicating with the latter, a gas feed tube having a gas channel and adjustable in the threaded opening in the closure of the mixing chamber, a valve stem in threaded engagement with the threaded opening in the closure of the air inlet chamber, a tapering valve member carried by said stem and controllingthe channel in the gas feed tube, and a disk-shaped valve carried by the stem and controlling the tapering air inlet passage.

2. A gas burner comprising a casing having an air inlet chamber, a mixing chamber, a fuel mixture discharge passage leading from the mixing chamber, a gas inlet chamber communicating with the mixing chamber, and an air feed portbetween the air inlet chamber and the mixing chamber, a valve stem adjustably mounted for endwise movement in the casing, a gas inlet nipple for connecting the gas inlet chamber with a source ofgas supply, a

valve member carried by the stem to control the air feed port, the surfaces of said valve member and port being relatively tapered, and a second valve member carried by the stem for concurrent movement with the firstnamed valve member, said second valve member controlling the inlet of gas through the bore of the nipple and the surfaces of said,

to control the air feed port, the surfaces of said valve member and port being relatively tapered, and a second tapered valve member carried by the stem for concurrent movement with the first-named valve member and movable in and controlling the inlet of gas through the bore of the nipple, said nipple being mounted for adjustment relative to said valve member.

4. A gas burner comprising a burner casing having a mixing chamber at one end thereof, an air inlet chamber at the opposite end thereof, an air fee-d port between said chambers, a threaded stem extending longitudinally of the casing and through the air inlet chamber, air feed port and mixing chamber and provided with air and gas feed valve members, thesaid air feed valve member governing the flow of air through the said air feed port, and a gas inlet nipple communicating with the mixing chamber and receiving the gas feed valve, said nipple being adjustable on the casing with relation to the valve, the air feed port and valve being rela tively tapered and the gas inlet valve and nipple having coacting tapered surfaces.

5. A gas burner comprising a burner casing having a mixing chamber, a burner communicating therewith, an air feed passage leading to the mixing chamber, a suction tube communicating with the mixing chamber, a gas feed nipple having a gas feed channel communicating with the suction tube, a valve movable in and controlling the air feed passage, said passage andvalve being relatively tapered, a tapering valve member movable in and controlling the channel in the gas feed nipple, the latter being adjustable with relation to said valve member, and an endwise movable stem carrying said valves and operable for conjointly moving the same.

6. A gas burner comprising a burner body having a mixing chamber, an air inlet chamber, a burner communicating with the mixing chamber, a tapering air feed passage between the air inlet chamber and mixing chamber, a suction tube communicating with the mixing chamber, a gas feed nipple having a gas feed channel communicating with the suction tube, a disk-shaped valve movable in and controlling the tapering air passage, a tapering valve movable in and controlling the gas feed channel, the gas feed nipple being adjustable with relation to said valve, and an endwise stem carrying the valves and operable for conjointly moving the same.

7. A gas burner comprising a burner casing having a mixing chamber, an air feed passage leading to said chamber, a suction tube communicating with the mixing chamnel communicating with the suction tube, a

valve movable in the air'passage to control the admission of air to the mixing chamber, the surfaces of said passage and valve being relatively tapered, a gas feed valve movable in the gas feed channel of the gas feed mem ber, the surfaces of the channel and gas feed valve being relatively tapered, and anendwise movable stem mounted on the casing and extending longitudinally thereof and carrying said valves, the said gas feed member being adjustable relatively to the gas feed valve.

8. A gas burner comprising a burner casing having an air inlet chamber open at its outer side, a mixing chamber open at its outer side. a burner communicating with the mixing chamber, an air feed passage connecting the air inlet chamber at its inner side with the inner side of the mixing chamber, a tapering air feed passage connecting the air inlet chamber at its inner side with the inner side of the mixing chamber, closures for the outer sides of the chambers, said closures having threaded openings, a gas inlet chamber 

